Clock.



G. KISHv CLOCK.

APPLICATION FILED APR. 8. I918.

I 1,298,353, Patented Mar, 25,1919.

GEORGE xrsrr, or CLEVELAND, onro.

CLOCK.

Specification of Letters Patent. Patented Mar, 25, 1919,

Application filed April 8, 1918. I Serial No. 227,217.

To all whom it may concern:

Be it known that I, GEORGE KrsH, a citizen of Hungary, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Clocks, of which the following is a full, clear, and exact descript on, reference being had to the accompanying drawings. I Y

' This invention relates generally to clocks and more particularly to the means for driving the hour and minute hands. It is one of the objects of the invention to provide a construction whereby a light, small and inexpensive clock movement may be employed for the purpose of driving a pair of large hands in coiiperation with a large dial.

A further and more limited object of the invention is to provide an improved con struction and arrangement of parts for driving said hands.

' In the drawings forming a part hereof, Figure 1 represents a front elevation, with parts broken away, of a dial, hands, and driving mechanism constructed in accordance with my invention and Fig. 2 is a central sectional View through such dial and driving mechanism, a clock supplying the power'for driving such mechanism being indicated in elevation.

Describing by reference characters the various parts illustrated herein, 1 denotes the case of a clock or watch, said clock or watch being provided with a central shaft 2, driven by the ordinary mechanism within the case; the projecting end of the shaft is angular in cross section, preferably square. 3 denotes a supporting frame for the dial and the parts associated therewith and conveniently and detachably connected to the clock or watch by means of the set screws 4. The frame 3 is provided with a central opening (preferably circular) and has secured to the front thereof the dial 5. This dial may be of any desired extent, the one indicated herein being particularly large and provided with a central openlng registered with the central opening of the frame 3. Secured to the front of the dial and to the frame 3, as by the lag screws 6, is the flange 7 of a hub, indicated generally at 8. The outer surface of this hub provides supports for the races of two anti-friction bearings onwhich are mounted the hour andthe minute hands, respectively, the outer surface of the hub being formed as two cylinders, the rear cylinder being of greater diameter than the front cylinder. The front part of the rear outer cylindrical surface of rear portion of such front cylindrical surfaces being smooth or plain, as indicated at 11. One of the races 12 of the ball bearing is secured to the rear cylindrical surface 9, as by having a driving fit thereon while the other race 13 is threaded onto the threaded portion of said surface. The "hour hand 14 is shown as carried by' the outer race 15 of the ball bearing, the balls 16 being interposed between said outer race and the inner race members 12 and 13. The hand 14-. and its counter-balance 1 1 are carried by the outer race and may be formed therewith. The front of the outer race 15 is threaded, enabling the reduction gear 17 to be conveniently applied thereto. A ring 18 having a projecting arm 19 and shown as threaded onto the front end of the cylindrical surface 9 serves as a means for retaining the ball race 13 in its adjusted position, being itself secured in place by means of a set screw 20. I

Mounted on the rear plain cylindrical surface 11 is one of the inner race ways 21, the other inner race way22 being threaded onto the front end of the reduced portion of the hub and being retained in place by means of a locking ring 23 threaded onto the front of the hub there being a washer 23 interposed between the parts 22 and 23.

The minute hand 24 is mounted on an outer raceway 25 similar to the outer race 15, there being balls 26 interposed between the outer'and inner races. The outer race way is threaded at its rear end for the application of a gear 27 which is adapted to mesh with a gear 28 mounted on one end of a shaft 29 journaled in the arm 19, the opposite end of said shaft being provided with a pinion 30 meshing with the gear 17, the gears 27, 28, 30 and 17 constituting a train of reduction gearing for driving the hour hand at one-twelfth the speed of the min ute hand.

Threaded upon the front end of the race 25 is a cylindrical cap 31 having a central opening for the reception of the front end of a spindle 32. This spindle is preferably forked at its rear end, the forks supporting an apertured plate 33 adapted toreceive the front end of the driving shaft 2. The aperture in the plate 33 will be so shaped as to receive the squared or angular end of the shaft 2, witha slight clearance. At its front end, the spindle 32 is provided with an angular extension 34, preferably square, and the central aperture in the cap 31 will be of like shape, whereby the spindle may provide a driving connection between the shaft 2, cap 31, and the hands 24 and 14. The spindle 32 is provided with a stop collar 35 serving to limit the rearward movement of the hub assembly, dial, and supporting frame, with reference to the body of the clock or other driving mecha nism. 7

With the parts arranged as illustrated and described it is believed the operation will be readily understood. The spindle 32 may be applied to the shaft 2 either before or after the application of said spindle to the cap 31. The arrangement of the parts is such that the dial and hub assembly will thus be centered with respect to the shaft 2, but this centering can be facilitated by means of the set screws 4, which also serve to secure the dial and hub assembly to the body of the clock or Watch. 7

The rotation of the shaft 2 is transmitted by the spindle 32, cap 31 and outer ball race 25 to the minute hand 24: and by said race and the gears 27, 28, 30 and 17 to the hour hand 14.

The counter-balancing of the hands and the mounting of the same on ball bearings enable them to be driven by a light and inexpensive watch or clock movement. By employing a short bearing (such as is afforded by the plate between the front end of the shaft 2 and the spindle, some lateral movement may be imparted to the spindle without danger of breaking the end of said shaft. The manner of mounting the dial and the assembly for driving the hands enables the dial and the parts attached thereto to be conveniently removed and replaced for the purpose of cleaning and repair. For convenience of description, the element 1 will be referred to hereinafter as a clock, it being understood that by the employment of such term I do notlimit myself to the use of a clock, my invention being equally capable of use with the employment of a watch or other movement capable of driving the shaft 2. I

Having thus described my invention, what I claim is:-

1. The combination, with a clock having a drive shaft, of a frame detachably connected to said clock, a dial secured to said frame, a hub alsosecured to said frame and havingapair of bearings thereon, a hand rotatably mounted on each of said bearings, a spindle supported by said frame and removably connected to said shaft, a driving connection between said spindle and one of said hands, and gearing connecting said hand and the other hand.

2. The combination, with a clock having a drive shaft, of a frame detachably connected to said clock, a dial carried by said frame, a hub having a flange secured to the dial and frame, longitudinally spaced inner raceways mounted on said hub, a combined hand and outer raceway cooperating with each set of inner raceways, balls interposed between the inner and outer raceways, a driving connection between said shaft and one of the outer raceways, and means including gears carried by the outer raceways for transmitting motion from one of said outer raceways to the other.

3. The combination, .with a drive shaft, of a dial, a hub, longitudinally spacedinner bearing members mounted on said hub, a combined hand and outer bearing member cooperating with each inner bearing member, a driving connection between said shaft and one of the outer members, and means including gears carried by the outer members for transmitting motion from one of said members to the other. 7

1. The combination, witha clock having a drive shaft, of a frame detachably connected to said clock, a dial connected to said frame, a hub having a flange connected to said dial and frame, said hub having pairs of longitudinally spaced inner raceway's thereon an outerraceway provided with a hand and cooperating with each pair of inner raceways, balls interposed between each; outer raceway and the corresponding inner raceways, a spindle mounted on said shaft and extend ing through the frame, dial and hub, a driving connection between the front end of said spindle and vthe outer raceway adjacent thereto, and a train of gearing interposed between the outer raceways and adapted to transmit the drive from the front to the rear outer raceway.

5. The combination, with a clock having a drive shaft, of a frame detachably connected thereto, a pair of longitudinally spaced inner bearings carried by said frame, a com bined hand and outer bearing associated with each inner bearing, means for driving bers and provided with a hand, a driving connection between the front or outer end of the spindle and one of said outer bearings, and connections for driving the other outer bearing from and at a different speedwfrom that of the last mentioned outer bearing.

7. The combination, with a clock having a drive shaft provided with an angular end, of a spindle having a plate provided with an angular aperture for the reception of such angular shaft end and having an angular front or outer end, a driving member having an angular aperture for the reception of the angular front or outer end of such spindle,

-' a stop on such spindle adjacent such front or outer end, a bearing member surrounding the spindle and having longitudinally spaced inner bearings, a pair of outer bearings each surrounding and cooperating with an inner bearing and provided each with a hand, one of said outer bearings being connected with said driving member, and gearing connecting said outer bearings.

8. The combination, with a clock having a shaft, of a combined dial and hand support detachably connected to said clock, inner bearings on said support, outer bearings cooperating with the inner bearings and each having a hand, a detachable driving connection between one of said outer bearings and the clock shaft, and driving connections between said outer bearing and the other outer bearing and adapted to drive the bearings at different speeds.

In testimony whereof, I hereunto affix my signature.

GEORGE KISH.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. 0." 

